Rotary



Aug. 16,1927. f L. PATTERSON ROTARY File'd May 16, v1924i 2 Sheets-Sheet2 Patented Aug. 16, 1927.

UNITE-D S'IATles PATENT oFFlcE.

LUTHER'PATTERSON, or HARRIS COUNTY, TEXAS, AsSIGNoR To t, or HARRISCOUNTY, TRxAs.

HOWARD F. SMITH,

ROTARY;

' Appiicatkionmearmay 1e,

This invention relates to new and useful improvements in a rotary.

Oneobject of the invention is to provide `a rotary of the which is givenin this specification and illus- Lit) trated in the accompanyingdrawings, where- 1n y Figure 1 is a plan view. y Figure 2 is a crosssectional view taken on the line 2-2 of Figure 1; and,

Figure 3 is a cross sectional'view taken on the line 3 3 of Figure 1.

Referring now more particularly to the drawings, wherein like numeralsof reference designate similar parts in each of the figures, the numeral1 designates the rotary bed plate, and the numeral 2 designates therotary table which is mounted to rotate thereon. This table rides on theantifriction rollers 3, which run in the race ways 4 and 5, in said bedplate and the underside of the l table respectively. The un'der side ofsaid table has the marginal bevel gear teeth 6 which mesh with thedriving pinion 7iixed on the drive shaft 8. l

The rotary table has the depending sleeve 9, therethrough which fitsthrough the opening 10 in the bed plate and is provided to receive thedrill pipe which is driven by said tab e.

On opposite sides of the table kopening there are the cleats 11, 11,which-are boltedv to the table, and whose facing sides have the grooves12,12. There are the plate like jaws 13, 13, whose ends dovetail intosaidgrooves and the adjacent edges of these jaws have the registeringnotches 14, 14, forming a character described equipped` with an improvedtype lof jaws for engaging 1924,. serial No. 713,826.'

square opening to receive the grieffstem. Il'

Theseaws are held in engagement wit-h the stem by means of the spaceblocks 15, 15,

which are fitted between the respective jaws I and the opposing-posts16, 16, carried by the table.v These blocks are of a size to hold the I"jaws closely together in drilling, but smaller blocks may be used tospace the jaws apart to permit the collars of the drill pipe to pass jthrough in'making vup or breaking up 'said pipe, as illustrated inFigure 1;

` The outer edges of these space blocks have the arcuate notches 17, 17,to receive saidl y posts and to hold the blocks in proper position whiledrilling and they have the handies 18, 18, by meansof which they may beeasily handled. i

When it is desired to release the grief stem to pull the drill'pipe,` orto make up or break up the same,the space blocks may be removed and thejaws easily movedapart to permit the handling of the drill pipe.

Vhat I claim is 1. A rotary drilling machine including a v rotary tablehaving a central opening to receive a pipe, a. track on said table,plate like jaws movable toward and from each othery along said track andwhose facing edges arev provided `with aligned notches arranged lto forma pipe receiving opening, posts on the table and space blocks fittedbetween the respective posts and the corresponding jaws. Y

" 2. A rotary drilling machine including a rotary table having a centralopening to re-` Y 'C-eive pipe, cleats on the table on opposite side ofsaid opening and whose facingsides are provided with grooves, plate likejaws whose ends fitY into said grooves, the adjacent edges of said jawshaving registering notches which form av polygonal opening, abutmentscarried by the table, one on each side of said pair of jaws and spacervplates adapted to be fitted between the respective jaws and thecorresponding abutment, the outer edges of said plates having notches toreceive the corresponding abutments.

In testimony whereof I have signed my name to this specification.

LUTHER PATTERSON. f

